READ ME File For Data for 'Effect of ablative and non-ablative Laser Shock Peening on AA7075-T651 corrosion and fatigue performance'

Dataset DOI: 10.5258/SOTON/D1949

ReadMe Author: Alvaro Sanchez, University of Southampton

This dataset supports the publication:
AUTHORS: Sanchez AG, Leering M, Glaser D, Furfari D, Fitzpatrick ME, Wharton J, Reed PAS.
TITLE: Effect of ablative and non-ablative Laser Shock Peening on AA7075-T651 corrosion and fatigue performance
JOURNAL:Material Science and Technology

PAPER DOI:https://doi.org/10.1080/02670836.2021.1972272


This dataset contains:
Zip content:
Vicker hardness measuremnets
LSP sample roughness measurements
AA7075 second hole results (residual stress measurements)
Ablative tafel plot all
All OCP graph origin
Combined hole drilling results
CRack propagation data all#
Galvanostatic test comparisons
Initiation propagation ratio
Residual stresses in Origin
S-N curve all data
XRD data

Require Microsoft excel and Origin Pro Software to access files.

The figures are as follows:

Figure 1 – Sample manufacturing steps (Type A and B)
Figure 2 – (a) Three-dimensional representation of AA7075-T651 microstructural planes and (b) intermetallic distrubution from SEM-EDS random sampling
Figure 3 - Centre hole drilling and XRD data for LSP and LSPwC samples. S1 in the longitudinal direction, S3 in the transverse direction
Figure 4 – Vickers micro-hardness measurements of baseline, LSP and LSPwC Type A and B samples.
Figure 5 – LSP and LSPwC surfaces and profiles.	
Figure 6 –Kernel average misorientation (KAM) data, average and smooth line of  LSP cross-section (LT-TS microstructural plane), distance away from surface from left to right, up to 1.15 mm subsurface. Taken from Sanchez et al. (2021).
Figure 7- Open-circuit potential 30 minutes (A,B) and 24 h (C,D) for untreated AA7075 (baseline), LSP and LSPwC Type A and B samples.
Figure 8 – A: Potentiodynamic polarisation of untreated AA7075 (baseline), LSP and LSPwC Type A and B. B: High galvanostatic control (2 h) for the  baseline, LSP, and LSPwC Type A and B samples. C: Low galvanostatic control (24 h) for the baseline, LSP and LSPwC Type A.	
Figure 9 – Pit initiation site at coarse constituent particles.  Dissolution of aluminium alloy around cathodic particle due micro-galvanic coupling.  Left: untreated AA7075 (baseline).  Right: LSP treated.  All intermetallics in these images are Al7Cu2Fe
Figure 10 – Surface profilimetry of the AA7075 (baseline) and LSPwC surfaces after 24 h galvanostatic control	
Figure 11 – Pit area fraction and pit density.  Areas equal or bigger than 10 µm depth are considered corroded.  A: Baseline, LSP and LSPwC Type A and B samples galvanostatic control (2 h, 2 mA cm–2).
Figure 12 – Left: Variable focus optical microscopy of pre-corroded LSP Type A sample.  Right: SEM cross section of pre-corroded pit feature in LSP sample showing true pit depth.
Figure 13 – Variable focus optical microscopy of pre-corroded Type A sample before (left) and after (right) fatigue.  Approximate fracture line drawn in red.
Figure 14 – Stress range vs. cycles to failure for AA7075 Type A (baseline), LSP and LSPwC samples (pre-corroded and uncorroded).  Uncorroded baseline and LSP samples are taken from Sanchez et al.	
Figure 15 – Crack growth (dc/dN) vs. stress intensity factor range (∆K) for baseline, LSP and LSPwC samples (pre-corroded and uncorroded).  Baseline and LSP uncorroded samples are taken from Sanchez et al.
Figure 16 –Average initiation and propagation life of untreated AA7075 (baseline), LSP (LSPwC is expected to be the same), pre-corroded baseline, pre-corroded LSP and pre-corroded LSPwC.  Columns show total fatigue life, including cycles at 0.1 and 0.5 load ratio



Date of data collection: 2017-2020

Information about geographic location of data collection: University of Southampton, United Kingdom

Licence: CC-BY

Relations: Projects: EP/N509747/1 (EPSRC funded)




Date that the file was created: Month, Year